参数资料
型号: WJLXT388LEB2
厂商: CORTINA SYSTEMS INC
元件分类: 数字传输电路
英文描述: DATACOM, PCM TRANSCEIVER, PQFP100
封装: 14 X 14MM, ROHS COMPLIANT, LQFP-100
文件页数: 38/80页
文件大小: 1017K
代理商: WJLXT388LEB2
Dual T1/E1/J1 Transceiver — Intel
LXT388
Datasheet
43
Table 24. Digital Loopback Register, DL (0CH)
Bit1
Name
Function2
3-0
DL3-DL0
Setting a bit to “1” enables digital loopback for the respective channel.
1. On power up all register bits are set to “0”.
2. During digital loopback LOS and TAOS stay active and independent of TCLK, while data received on TPOS/TNEG/TCKLK is
looped back to RPOS/RNEG/RCLK.
Table 25. LOS/AIS Criteria Register, LCS (0DH)
Bit
1
Name
Function
2
3-0
LCS3-LCS01
T1 Mode
2
Don’t care. T1.231 compliant LOS/AIS detection is used.
E1 Mode
Setting a bit to “1” selects the ETS1 300233 LOS. Setting a bit to “0” selects G.775 LOS
mode. AIS works correctly for both ETSI and ITU when the bit is cleared to “0”. See
errata revision 10.3 or higher for a way to implement ETSI LOS and AIS.
1. On power-on reset the register is set to “0”.
2. T1 or E1 operation mode is determined by the PSDR settings.
Table 26. Automatic TAOS Select Register, ATS (0EH)
Bit1
Name
Function
1-0
ATS1-ATS0
Setting a bit to “1” enables automatic TAOS generation whenever a LOS condition is
detected in the respective transceiver.
7-2
-
Write “0” to these positions for normal operation.
1. On power-on reset the register is set to “0”.This feature is not available in data recovery and line driver mode (MCLK= High
and TCLK = High)
Table 27. Global Control Register, GCR (0FH)
Bit1
Name
Function
0
JASEL0
These bits determine the jitter attenuator position.
1
JASEL1
2JACF
This bit determines the jitter attenuator low limit 3dB corner frequency. Refer to the Jitter
Attenuator specifications for details (Table 46 on page 59).
3FIFO64
This bit determines the jitter attenuator FIFO depth:
0 = 32 bit
1 = 64 bit
1. On power-on reset the register is set to “0”.
JASEL0
JASEL1
JA Position
1
0
Transmit Path
11
Receive Path
0
x
Disabled
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